Some games have been reserved for mid-December and will be removed from the Xbox Game Pass offer.
Microsoft has now published a list of games that will be removed from Xbox Game Pass on December 15, 2021. So far, six games have been reserved and will soon disappear from the catalog.
If you would like to continue playing games that will be removed in mid-December, you can of course buy them permanently from the Microsoft Store at any time. As long as they are still in the Xbox Game Pass, as a subscriber you will receive a 20% discount on purchase.